In response to the COVID-19 outbreak, we have developed a new set of technician and office procedures so that we may safely provide in home services to our customers.


These procedures have been developed to keep our customers and employees healthy. It is not always known if someone has the virus. Therefore, the best way to protect you and ourselves is to use an assumption thought process. Assume we all have the virus, and we are all trying to keep others from catching it. 


Technician Procedures

  • Technicians will wear gloves upon the arrival and entrance of a customer’s home. Dispose of gloves before entering your vehicle.

  • Upon leaving a customer’s home, technicians should sanitize all surfaces including door handles, steering wheels, tool handles and any items used at the customer’s location.

  • Technicians will sanitize their hands frequently upon entering their vehicles.

  • Technicians will maintain safe social distances from others, no less than 6 FEET apart at all times.


Office Procedures

  • Upon entering the office all employees will wash their hands thoroughly and frequently throughout the day.

  • All employees will have their temperatures checked twice daily, upon arrival, and before leaving work at the end of the day. (No Contact Digital Thermometer)

  • All employees will maintain safe social distances from others, no less than 6 FEET apart at all times.

  • The office surfaces will be disinfecting frequently throughout the day. This includes desktop surfaces, door handles, and other frequently used surfaces.

  • The office will be closed to the public. Customers may call us at 673-1356 if in-person assistance is needed.


Please Do Not Call If:

  • Any persons in your household are displaying symptoms.

    These include:

    • cough

    • fever

    • tiredness

    • difficulty breathing (severe cases)

  • Any persons in your household have been in close contact with any Covid-19 virus confirmed persons.



Air Quality Resources:


Coronavirus: Fresh-Aire UV efficiency against viruses, bacteria & mold


A message from the Arkansas HVACR Association + AIR QUALITY FACTS: 
This is a trying time and we all are in disbelief as to how this is affecting our country and state. One thing I am sure of, our Members are Arkansans and this will not whip us. Providing heating and air conditioning is a health and safety issue and we stand ready to provide that service even at a time like this.  

The ASHRAE Position Document on Airborne Infectious Diseases, reaffirmed February 5, 2020, states, “Because small particles remain airborne for some period of time, the design and operation of HVAC systems that move air can affect disease transmission in several ways, such as by the following: [1] • supplying clean air to susceptible occupants • containing contaminated air and/or exhausting it to the outdoors • diluting the air in a space with cleaner air from outdoors and/or by filtering the air • cleaning the air within the room

UVGI lights: UVGI lights have been in use since the early 1900s. In 1903, Niels Fensen received a Nobel Prize for his use of ultraviolet light to combat tuberculosis.[3] According to the ASHRAE position paper previously quoted, UVGI lights can inactivate some disease-transmitting organisms and it can also affect disease transmission rates. [1] We have all seen the bluish light in a box near the ceiling in a medical facility. That is probably UV lighting. Due to the current nature of the COVID-19 virus, there are no studies as to the use of UVGI lights; however, one can feel confident that a properly installed in duct system will help inactivate some diseases. We cannot guarantee the absolute health and safety of a home with UVGI lighting but we know that it will help in many situations.

Humidity: ASHRAE reported one study which concluded that influenza retains maximum infectivity at a low humidity level of 23%. [1] The infectivity dropped dramatically at 43%. While there are even more opportune settings for dropping infectivity, above 86/50, the comfort level in the home would be undesirable. [1] So, it would appear that humidification and de-humidification are valid strategies for designing a healthy home.

Proper Ventilation: ASHRAE also discusses the need for proper ventilation. It makes sense that, especially in a tight home, the air can become increasingly polluted with a disease organism. The Arkansas Mechanical Code requires a minimum natural air change rate of 0.35 per hour. [2] New construction now mandates the use of mechanical ventilation. As we push even harder for tighter homes for energy savings, we must remember that fresh air is critical to the health and safety of homes and all occupied structures. Pre 2018 homes are not likely to have mechanical ventilation, yet homes built after 2015 may not meet the minimum ventilation requirement.

[1] The ASHRAE Position Document on Airborne Infectious Diseases, reaffirmed, February 5, 2020, pgs. 8,9 file:///E:/NewsMagazine/Coronavirus/Airborne-Infectious-Diseases.pdf

[2] Arkansas Mechanical Code, Table 403.3, pg. 31

[3] [34] Viqua, “History of UV”, https://viqua.com/water-treatment/uv-water-treatment/the-history-of-uv/

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Regular Office Hours :

M- F, 8 am to 5 pm (Closed 12-1pm)


After Hours Service Available on

Nights, Holidays & Weekends.



Derdens provides Electrical and HVAC sales, services and repairs for Stuttgart, Roe, Ulm, Casscoe, Clarendon, Brinkley, Almyra, DeWitt, Lodges Corner, England, Des Arc, DeValls Bluff, and nearby surrounding areas. 


Areas outside of Stuttgart will include mileage fees.



HVAC License #: 1556542017

Contractors License #: 0040140718

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